Motorola CPCI-6115 manual Sources of Reset, Machine Check, Soft Reset, 2.5 SMI

Functional Description Interrupt Handling

3.The interrupting device is addressed from the MC64360 Device Bus.

4.The interrupting device is addressed from the MV64360 I2C Bus.

5.The interrupting device is addressed from the MV64360 PCI Bus 1.0 through the 21555 PCI-to-PCI bridge.

6.The DS1621 Digital Thermometer and Thermostat provides 9-bit temperature readings which indicate the temperature of the device. The thermal alarm output, TOUT, is active when the temperature of the device exceeds a user defined temperature TH.

4.4.2.2Sources of Reset

The CPCI-6115 SBC provides reset control from a programmable logic device (PLD) to provide maximum flexibility of the circuit design. A hard reset is defined as a reset of all onboard circuitry including the PowerPC hard reset and reset of all onboard peripheral devices. A soft reset is defined as a reset of the PowerPC. The CPCI-6115 has these listed sources of reset:

zPower-On/undervoltage reset

zFront panel reset switch

zCompactPCI RESET# signal

zMV64360 Watchdog Timer

zM48T37V Watchdog Timer

zSystem Control Register bit

The Processor RiscWatch HRESET# signal can cause a CPU-only reset.

4.4.2.3Machine Check

The processor MCP# signal is pulled high (inactive).

4.4.2.4Soft Reset

The processor SRESET# signal is connected only to the RiscWatch header.

4.4.2.5SMI

The processor SMI# is pulled high (inactive).

4.4.2.6Other Software Considerations

The following issues also apply to this board.

The MV64360 supports a big endian CPU bus. The endianess of the local memory (DDR and SRAM) is also big endian. Data transferred to/from the local memory is NEVER swapped. The internal registers of the MV64360 are always programmed in Little Endian. On a CPU access to the internal registers, data is byte swapped.

Data swapping on a CPU access to the PCI is controlled via PCISwap bits of each PCI Low Address register. This configurable setting allows a CPU access to PCI agents with a different endianess convention.

86 CPCI-6115 CompactPCI Single Board Computer Installation and Use (6806800A68D)